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Journal of Mechanical Science and Technology

, Volume 33, Issue 9, pp 4545–4553 | Cite as

Combustion behaviors of wood pellet fuel and its co-firing with different coals

  • Lkhagvadorj Sh
  • Tae-Yong Jeong
  • Ki-Tae Jeon
  • Kyung-Won Park
  • Byoung-Hwa Lee
  • Chung-Hwan JeonEmail author
Article
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Abstract

Biomass resources, which are carbon-neutral and sustainable, may help to address climate change and reduce greenhouse gas emissions. This study was performed to examine the effects of wood pellet (WP) particle size, environmental conditions (stoichiometric ratio; SR), and blending ratio on the combustion characteristics of single fuels and blends using a thermogravimetric analyzer and drop tube furnace (DTF). The results indicate that WP demonstrated a higher mass reduction in the devolatilization region and a faster reaction rate compared with coal. Blends tested in the analyzer showed the expected profiles for devolatilization and char oxidation without the presence of non-additive effects. However, the DTF results showed that simultaneous reactive and non-reactive phenomena occurred with increasing biomass-blending ratios. When WP fuel containing fine particles (< 200 μm) was blended with coal under low SR conditions, early-stage oxygen deficiency was caused by rapid combustion. WP fuel containing coarse particles (> 600 μm) showed that unburned carbon (UBC) increased owing to slower reactivity. WP fuel containing particles of 400 μm or less in size demonstrated superior UBC performance, indicating that biomass-coal blends were significantly affected by blending ratio, particle size, and the surrounding environment.

Keywords

Biomass blending ratio Particle size Reactivity Stoichiometric ratio Wood pellet 

Nomenclature

Vt

Devolatilization exhausted at a particular time

V*

Total devolatilization exhaust

E

Activation energy

R

Ideal gas constant

k0

Pre-exponential factor

a

Heating rate

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Notes

Acknowledgments

This research was supported by the Science and Technology Support Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (MSIT) [2017K1A3A9A01013746].

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Copyright information

© KSME & Springer 2019

Authors and Affiliations

  • Lkhagvadorj Sh
    • 1
  • Tae-Yong Jeong
    • 1
  • Ki-Tae Jeon
    • 1
  • Kyung-Won Park
    • 1
  • Byoung-Hwa Lee
    • 2
  • Chung-Hwan Jeon
    • 3
    Email author
  1. 1.School of Mechanical EngineeringPusan National UniversityBusanKorea
  2. 2.R&D TeamDoosan Heavy IndustriesChangwonKorea
  3. 3.School of Mechanical Engineering, Pusan Clean Coal CenterPusan National UniversityBusanKorea

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